Distributed analysis of guided acoustic waves Brillouin scattering: a new class of fiber sensor (Conference Presentation)

2018 ◽  
Author(s):  
Gil Bashan ◽  
H. Hagai Diamandi ◽  
Yosef London ◽  
Eyal Preter ◽  
Avinoam Zadok
Keyword(s):  
Acoustic Waves ◽  
Brillouin Scattering ◽  
Fiber Sensor ◽  
New Class ◽  
Distributed Analysis

scholarly journals High sensitivity distributed temperature fiber sensor using stimulated Brillouin scattering

2017 ◽  
Vol 25 (26) ◽  
pp. 32591 ◽  
Author(s):  
Victor Lambin Iezzi ◽  
Sebastien Loranger ◽  
Raman Kashyap
Keyword(s):  
Brillouin Scattering ◽  
Stimulated Brillouin Scattering ◽  
High Sensitivity ◽  
Fiber Sensor ◽  
Stimulated Brillouin

scholarly journals Elastic Constants of Diamond-Like Carbon Films by Surface Brillouin Scattering

1999 ◽  
Vol 593 ◽  
Author(s):  
A.C. Ferrari ◽  
J. Robertson ◽  
R. Pastorelli ◽  
M.G. Beghi ◽  
C.E. Bottani
Keyword(s):  
Thin Films ◽  
Amorphous Carbon ◽  
Elastic Constants ◽  
Acoustic Waves ◽  
Brillouin Scattering ◽  
Surface Acoustic Waves ◽  
Carbon Films ◽  
Diamond Like Carbon ◽  
Amorphous Carbon Films ◽  
Tetrahedral Amorphous Carbon

ABSTRACTThe elastic constants of thin Diamond-Like Carbon (DLC) films supply important information, but their measurement is difficult. Standard nanoindentation does not directly measure the elastic constants and has strong limitations particularly in the case of hard thin films on softer substrates, such as tetrahedral amorphous carbon on Si. Surface acoustic waves provide a better mean to investigate elastic properties. Surface Brillouin scattering (SBS) intrinsically probes acoustic waves of the wavelength which is appropriate to test the properties of films in the tens to hundreds of nanometers thickness range. SBS can be used to derive all the isotropic elastic constants of hard-on-soft and soft-on-hard amorphous carbon films of different kinds, with thickness down to less than 10 nm. The results help to resolve the previous uncertainties in mechanical data. The Young's modulus of tetrahedral amorphous carbon (ta-C) turns out to be lower than that of diamond, while the moduli of hydrogenated ta-C (ta-C:H) are considerably lower than those of ta-C because of the weakening effect of C-H bonding.

Brillouin-Scattering Study on Mixing Effects of Acoustic Waves in Photoconductive CdS

1974 ◽  
Vol 36 (3) ◽  
pp. 747-752 ◽  
Author(s):  
Masayoshi Yamada ◽  
Chihiro Hamaguchi ◽  
Junkichi Nakai
Keyword(s):  
Acoustic Waves ◽  
Brillouin Scattering ◽  
Mixing Effects ◽  
Scattering Study

Guided acoustic waves Brillouin scattering in multi-core fibers

2017 ◽  
Author(s):  
H. Hagai Diamandi ◽  
Yosef London ◽  
Avi Zadok
Keyword(s):  
Acoustic Waves ◽  
Brillouin Scattering

scholarly journals Elastic Constants of Diamond Like Carbon Films by Surface Brillouin Scattering

1999 ◽  
Vol 594 ◽  
Author(s):  
A. C. Ferrari ◽  
J. Robertson ◽  
R. Pastorelli ◽  
M. G. Beghi ◽  
C. E. Bottani
Keyword(s):  
Thin Films ◽  
Amorphous Carbon ◽  
Elastic Constants ◽  
Acoustic Waves ◽  
Brillouin Scattering ◽  
Surface Acoustic Waves ◽  
Carbon Films ◽  
Diamond Like Carbon ◽  
Amorphous Carbon Films ◽  
Tetrahedral Amorphous Carbon

AbstractThe elastic constants of thin Diamond-Like Carbon (DLC) films supply important information, but their measurement is difficult. Standard nanoindentation does not directly measure the elastic constants and has strong limitations particularly in the case of hard thin films on softer substrates, such as tetrahedral amorphous carbon on Si. Surface acoustic waves provide a better mean to investigate elastic properties. Surface Brillouin scattering (SBS) intrinsically probes acoustic waves of the wavelength which is appropriate to test the properties of films in the tens to hundreds of nanometers thickness range. SBS can be used to derive all the isotropic elastic constants of hard-on-soft and soft-on-hard amorphous carbon films of different kinds, with thickness down to less than 10 nm. The results help to resolve the previous uncertainties in mechanical data. The Young's modulus of tetrahedral amorphous carbon (ta-C) turns out to be lower than that of diamond, while the moduli of hydrogenated ta-C (ta-C:H) are considerably lower than those of ta-C because of the weakening effect of C-H bonding.

Stimulated Brillouin scattering of an electromagnetic wave in a magnetoactive dissipative multi-ion-species plasma

1995 ◽  
Vol 53 (2) ◽  
pp. 127-133 ◽  
Author(s):  
M. Bose
Keyword(s):  
Growth Rate ◽  
Electromagnetic Wave ◽  
Acoustic Waves ◽  
Brillouin Scattering ◽  
Negative Ions ◽  
Stimulated Brillouin Scattering ◽  
Magnetized Plasma ◽  
Ion Acoustic Waves ◽  
Stimulated Brillouin ◽  
Ion Species

Stimulated Brillouin scattering of an electromagnetic wave is investigated analytically in a dissipative magnetized plasma in the presence of negative ions. With an increase in the number of negative ions (maintaining quasi-neutrality), it is found that the growth rate of ion-acoustic waves decreases very slowly up to 50% concentration (i.e. half of the total ionic contribution) of negative ions. Further increase in the number density of negative ions beyond 50% results in a sharp fall in growth rate.

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